.TH islower 3 "" "" ""
.SH SYNOPSIS
islower \- lower-case character predicate
.SH ANSI_SYNOPSIS
#include <ctype.h>
.br
int islower(int 
.IR c );
.br
.SH TRAD_SYNOPSIS
#include <ctype.h>
.br
int islower(
.IR c );
.br
.SH DESCRIPTION
.BR islower 
is a macro which classifies ASCII integer values by table
lookup. It is a predicate returning non-zero for minuscules
(lower-case alphabetic characters), and 0 for other characters.
It is defined only when 
.BR isascii (<[c]>)
is true or 
.IR c 
is EOF.

You can use a compiled subroutine instead of the macro definition by
undefining the macro using `
.BR #undef islower '.
.SH RETURNS
.BR islower 
returns non-zero if 
.IR c 
is a lower case letter (
.BR a --<<z>>).
.SH PORTABILITY
.BR islower 
is ANSI C.

No supporting OS subroutines are required.
.SH SOURCE
src/newlib/libc/ctype/islower.c
